Bitcoin Forum

Like this title says..

I currently have a 12 1080 ti rig running from an 12 gauge extension cord (2 1200w bitmain psu to power 12 gpu's and a 1050w psu to power mb and risers.  The extension wire do get a little warm.  I also have another 6 1080 rig which i put it upstair (afraid ill trip my 20 amp fuse). My real question is....how do you manage to run multiple rigs without re-doing all your house wires?

The limits are pretty simple. You can’t run more than 20A on a 20A circuit. The only option other than running a lot of dedicated 20A circuits or 30A circuits is to spread your miners around your house.

...and might as well get 240v circuits if you are re-wiring.

As others have said if you are wanting to runs as efficient & safely as possible it is really important to use dedicated circuits. I currently have 3 new 20A breakers in the main circuit panel powering all two of my ASIC miners and one of my GPU miners. Also, you have to keep in mind what the main breaker can draw for power as well or you could risk overheating it and tripping the main, a this can be a very bad issue i.e. burning down your house -https://www.youtube.com/watch?v=xNnAvTTaJjM (https://www.youtube.com/watch?v=xNnAvTTaJjM) status.

Also if it is continuous you really should only do 80% of the rating. This would be 1920 watts for 120v on a 20 amp circuit.

I would only run one 8 x 1080TI rig on this setup. I use 225-250w per 1080TI.

You really should run 240v with this kind of draw.


Below is my 125amp panel dedicated to mining. Yes, I did it all myself.

I undervolt them and runs roughly 180ish watt each.. so that's why I ran 3 psu instead of 2...

Problem of rewiring is that my electric panel is @ basement and I have to run some seriously wires to first floor laundry room (which I'm using it for mining)..it's a weird NYC townhouse set up I know.....

On top of this....I never ran electric wires before.  I mean I'm pretty handy (I can build a honda engine with my eyes closed) but I don't want to be on the news :)  And hiring an electrician is going to cost heck lot more money.

sigh....maybe I should youtube and do it myself :)

Jeff-

If you run 2x 240v 30A circuits to your laundry room it is only two lines. Then get two PDUs.

How much did getting the this panel installed set you back, I think in the very near future I am going to have to get a 400 amp service 200 on the house, and 200 on the mining shed quite possibly.

If all you have to do is put in some breakers and run the wire, it's probably something you could easily learn about on youtube or just google searching.    As long as you have the open slots in the breaker panel.

Basically it's turning off the panel, popping in 2 30AMP 240V breakers and running the correct size wire to an L6-30R receptacle.  Then buy a PDU and that will give you some room for 3-4 miners usually.  (Mine draw 5-5.5 amps so I can get 4 on a line and not violate the 80% rule). 

You could always call an electrician and explain what you want to do and see if they can give you an estimate at least on the phone. 

I am currently looking to also get 240 ran, I would run it myself but I am afraid that my main isn't large enough for the power draw. Does anyone have any idea what the average cost is to get the main upgraded for a residence?

It really depends on what you are at now and what you want to go to.   I was upgrading from 100amp to 200amp and it was 3600.  I ended up getting lucky and the power company ran lines to my house that support 400amp so I just need to change the main box if I want to do that.  (Currently it can support 250AMP).   I then have 100 AMP ran to my house and a 200AMP ran to my mining rig setup.   My total cost was $4100.  This included them digging a 30 foot trench that was 3 feet deep to run the power from the transformer to my residence. 

A side note, when I was calling for quotes, most  places said it would be $3800 if my power was ABOVE ground and it goes up a lot if they had to dig.  I just happen to find a contractor who would do it cheaper.    I suggest you upgrade to 400AMP if you can do it because it saves you running more lines in the future.

Good luck!

Would echo others recommending 240s. I had rigs on about 4 120 volts spread about some, but am very careful and made sure that everything on the line stayed under 80%. With a bunch of 1080tis, other than splitting them across multiple rigs on different circuits, not sure what the best options are. You can get pdus for 240s.

I'll do hardwired light fixtures and replace receptacles and such but don't run lines of a panel, and definitely would not with 240s. I'm personal risk-averse and paid a bit more to have an electrician do it, though don't know what the NYC rates are.

Also, if it's in your basement, could add teeny bit of property value as electric dryers run off 240s, so if you have a gas dryer and no 240, it's not going to look out of place to add one.

As I can't redo most of the wiring in my current location, I deliberately build my rigs to draw appx. 700 watts (which is a hair under 6 amps at the voltage I see at my outlets) then put 2 of them on each 15 amp outlet (but see below).

The weird part is that the WIRING in this place is sized for 20 amps per circuit (except for the one 30 amp 234VAC outlet) and most of the breakers are 20 amp, but almost all of the circuits feed a SINGLE duplex 15-amp outlet - if I could find a NEMA 5-20 duplex outlet that didn't cost an arm and a leg I could upgrade the rigs quite a bit (though PS tend to get a lot more expensive per watt past around the 860 watt range, and are starting to climb at THAT level).

If you're not a trained electrician though, I'd not recommend doing it yourself (I was a union-trained Journeyman and licensed electrician for a while in my youth, and I've kept up on the relevant Code changes).

Insisting on a 12 card 1080ti  on a 120 volt circuit =   

 ;D ;D ;D

https://www.youtube.com/watch?v=0gxKStPXyn8

 ;D ;D ;D



The fix  for your problem is run  6 card 1080ti rigs with  10 gauge  cords

https://www.ebay.com/itm/10-10-Gauge-Black-Heavy-Duty-Extension-Cord-MADE-IN-USA/122625387190?

So I’ve decided to hire an electrician to come wire me some 220’s.  I’m thinking 2 100 amp outlet (If possible since I live in ny and I’m hoping these old houses can handle that much power).  Anyway, What do you guys do for extension cords since most pdu I see are 30 amps only....how do you guys do it?

Do three 30 amp

A 30 amp will do 4 s9

Or 4 six card rigs of 1080tis

Thank you!  This is the type of answer I was looking for (in plain dumb english).

I'm planning to run 3 13 card board (B250 board) and possibly upgrading to 19 on each board if I can ever get my hands on those....I read it somewhere that 30 amp should be good for 5000w so I guess 3 30 amp is probably my best bet right?

Again, thanks for the answer guys!

Jeff-

30 derates to 24 to be safe for a 24-7-365 run time


220 can be 217 to 242 volts in USA residential

So 217 x 24 = 5200 watts. Minimum

If you are near a hot transformer with no drop

I am and I run 239- 242 volts

Or 240 x 24 = 5760 watts. I have been able to run at 5500 watts year round

My first comment.  Listen to Phillip.  He know's what he is talking about.  

I wouldn't have felt comfortable re-arranging my breaker box, installing 30A breakers, running the wiring, and installing the outlets myself.  I have a friend who is an electrician, so I paid him to do it.  I had two 30A outlets installed in my mining room.  They were short runs, so only ended up having to get 50' of romex.  For two outlets, the materials shouldn't cost more than $200 or so.  The L6 recepticals are around 20-25 each.  50ft of 10-3 romex was $75.  The 30A breakers he already had and didn't charge me any extra for.  There are some other odds and ends that you'll need.

I ended up paying him $100 for the labor and around $150-$175 for the materials.

Nice price for that amount of work you have a good friend

I know.  He saved me a lot of money.  I got quotes from a few different small to mid sized companies who employ electricians that were willing to do the job.  Problem was that every quote that I got was triple what I paid my friend.  My friends company only does large industrial jobs, but he told me the same thing. 

Finding someone who does that all day long and is willing to do side work is way better than the alternatives.

Sounds like a nice set up--and can't beat that price!

I added a 125 Amp sub panel in my garage tapped off a 220 Amp main panel. Cost about $600 in parts / copper and a sh*t load of sweat.... Digging and pulling cable was no joke. All @ 120v...

I was sore for a week afterwards as getting into the crawl space under my house sucked on a monumental scale. The good news is I am only pulling about 54 amps and have room to grow!!!

So I have an electrician coming tomorrow to install 2 dual 60amp breaker and will have 4 plugs...

A stupid question

does this mean I have 220v power?

I just put extra in case I want to get more GPUs (even though it's not worth it right now..but for future consideration).   How much power can I run?

You would want to ask the electrician what he's installing.  I'd imagine 60 amp are probably 240V but you'd need to check with him.   
I'm assuming you are having L6-30R receptacles put in?

Ask him or use a meter to check them. 

he's actually gonna be 4 UK type plug (https://www.amazon.com/220-250v-BITMAIN-Antminer-CryptoCoin-Miners/dp/B07B3Z196P/ref=sr_1_2_sspa?ie=UTF8&qid=1523143259&sr=8-2-spons&keywords=antminer+power+cord&psc=1).  Should I use the L6-30R instead?   

Am I overkilling it by installing 2 dual 60 amp breaker?  it seems like all the plugs are only goo for 30 amp

I'm in the US so i'm not sure how different it is for you power wise.  But when i went this upgrade route, i had 4 L6-30R receptacles put in (30 amp each so 4 breakers total).  I then plug a PDU into these and can put around 4 (8 GPU) Rigs on each or possibly 4 ASICS depending on the power measurements.     So for 4 outlets, i can have 16 rigs setup and running.  (Would draw approx 98 amps at 240v).

I'd personally recommend going a route where you can plug a PDU into the receptacle and then add units to the PDU itself and not directly to an outlet.   If you can plug in a 60 AMP PDU into those, then go for it, otherwise i'd go 30 AMP breakers and 30 AMP PDU (which will probably be a ton cheaper than 60 AMP PDU if they are even made that are not 3 phase).

Just my thoughts.

If you're in the US, use US CODE type outlets - which means NEMA 6 of some sort for a 234V circuit (14 if you want the flexbility of 234V OR 117V on a particular circuit) or NEMA 5 for 117V.

British type plugs/sockets would work and be safe if used within their raitings, but would be an automatic FAIL on any sort of inspection as they don't meet US code requirements - and NO sane electrician will install them in the US.

Yeah i would get whatever works in your country PDU wise for 30amp.  I'm not sure i'd do 60amp becasue finding PDU's for those may be near impossible or super expensive.

30 amp PDUs are common because many or most data centers traditionally used 30 amp "drop cords" to feed their racks from.
That has changed some in recent years, as "density" has become more important to many data centers but the change has often been to set up *2* or *3* 30-amp drop cords to feed a single rack (like the OpenCompute version that put 45 separate dual-CPU servers into a single custom rack).

Most servers tend to be designed to run on 208 VAC or 234 VAC though, as it's a bit more efficient to run and 208VAC in particular is easy to pull out of a common 440VAC three-phase power feed into a fairly large data center.


I am not aware of ANY NEMA 60-amp outlet of any sort, and I'm not sure if anything larger than 50 amp has ever been available - higher current machinery tends to be large enough to make hard-wiring it practical (and required under the Code at some point).

Even the old Mobile Home 50-amp hookups (NEMA 14-50 in all the cases I've ever seen) are no longer allowed for new installations, though they are "grandfathered" in and acceptable on existing installations, and they seem to still be acceptable for RV usage in campgrounds.

Yup.  That's exactly what I did.  I ended installing 4 30 amp plugs (figure that'll be way more than enough for my use).

Thanks for the help guys!   Now I just need to wait for my wires to show up so I can have the transformation begin!